Not quite people going door to door threatening people. but with Absentee Voting by mail, there have been plenty of cases of a Candidate's family member or a party operative making the rounds of the nursing homes and special needs homes and "assisting" residents in filling out absentee ballots. Alot of these people you could make a very good argument that the voter lacks sufficient mental capacity to cast a ballot. This happens in plenty of local elections around here. Most of the cases are not really covered by the media either.